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Mini PEG

4ms Company

User Manual 1.0 – September 12, 2022 

The 

Mini PEG

 is a clock-synced envelope generator and LFO whose envelope times are set by the 

time between clock pulses or “pings”. The 

Mini PEG 

is the latest version of the classic 4ms Pingable 

Envelope Generator. 

Mini PEG

 features:

 

• Envelope length set by incoming clocks or “pings” 

Ping

 button (tap tempo) or external clock/triggers set the envelope time  

Div/Mult

 knob and CV jack divide and multiply ping clock from /32 to x16 

Shape

 knob with full CV control for waveshaping the output envelope, includes various 

combinations of exponential, linear, logarithmic and interpolated curves  

Cycle

 button and gate jack for looping envelopes  

Scale

 knob acts as attenuating inverter for main envelope output 

Maximum 9.5V peak-to-peak 

Offset

 knob for setting DC offset, ranging from -9.4V to +9.4V 

End-of-Fall

 (

EOF

) output jack goes high when envelope finishes a fall portion and low when 

envelope begins a fall portion 

Jack can also be configured as End-of-Rise, Half-Rise, or Tap Clock Out 

ENV OUT

 jack outputs scaled/offset envelope 

5V ENV

 jack output always produces a 0V to +5V envelope, independent from scale/offset 

Trigger

 jack starts or re-starts an envelope 

Can be configured as Quantized Trigger, Async Trigger, or Async Gate 

• 8HP Eurorack module  

6

7

8

=

x2

/2

4

4

5

5

6

7

8

12

16

x16

/32

3

3

Div/Mult

Shape

Scale

Offset

Div

Shape CV

Trigger

Mini PEG

Cycle

EOF

5V ENV

ENV OUT

Ping

Cycle

Summary of Contents for Mini PEG

Page 1: ...nd interpolated curves Cycle button and gate jack for looping envelopes Scale knob acts as attenuating inverter for main envelope output Maximum 9 5V peak to peak Offset knob for setting DC offset ranging from 9 4V to 9 4V End of Fall EOF output jack goes high when envelope finishes a fall portion and low when envelope begins a fall portion Jack can also be configured as End of Rise Half Rise or T...

Page 2: ...ed but incorrectly connecting any module in any system can damage other modules on the power bus Setting up your Mini PEG 2 Overview 3 Beginning Patch 3 Control Details 4 Ping 4 Div Mult 4 Cycle 5 Trigger 5 Shape 5 Scale 5 Offset 5 ENV OUT 6 EOF 6 Maximum and Minimum Clock Times 6 Sync and Async Modes 7 Changing between Sync and Async Mode 7 Cycle Button in Sync and Async mode 7 Modulating Div Mul...

Page 3: ...ite at the tempo you tapped If you give a third tap the time between taps will be averaged You could also run an external clock into the Ping jack when a trigger is received on the Ping jack the internal tap tempo clock is stopped Step 3 Provide a trigger source Like any envelope module the Mini PEG will produce an envelope when it receives a trigger Also like many envelope modules it can be set t...

Page 4: ...n if you don t provide any more trigger pulses Note in System Mode you can disable this free running feature thus giving the Mini PEG two external pulses will output just one envelope and then stop See the System Mode section When a gate is received on the Ping jack the tap tempo clock is disabled Conversely when the Ping button is tapped the external clock will be overridden Try tapping a fast te...

Page 5: ...mes and the selection of waveshapes logarithmic linear exponential While there is a continuous spectrum of waveshapes the range can be divided into three zones The first zone is from fully counter clockwise to around 9 30 Turning the knob clockwise the envelope starts as a ramp up exponential shape and slowly turns to a linear ramp up shape The transition from the first zone to the second zone goe...

Page 6: ...nd of Rise jack a Half Rise jack or a Tap Clock output jack End of Rise EOR goes high when a fall segment starts and stays high if it stops and goes low when a rise segment starts and stays low if it sustains This jack could be called Envelope is Falling or Stopped Half Rise goes high when the rise portion is half way finished stays high through any sustain period and goes low when the fall portio...

Page 7: ...When you turn on the Cycle button in Sync mode the envelope will immediately start outputting from the same phase as the ping clock You can imagine this as if the envelope was always running in sync with the ping clock and the Cycle button un mutes it See Figure 2 This can cause some discontinuities but the envelope will always be in sync with the ping clock When you turn Cycle off the output will...

Page 8: ...so that it starts on the 3 See Figure 8 This can be useful for multi phase outputs e g Quadrature patch Tap Clock Output The EOF jack can be configured to output a tap tempo clock This is done in System Mode see System Mode section When configured as Tap Clock whatever tempo you tap on the Ping jack will be steadily output on the EOF jack Unlike configuring the EOF jack as End of Rise End of Fall ...

Page 9: ...odule When a firmware update is available it will be posted on 4mscompany com as a WAV file or zipped WAV file Updating Firmware 1 Download the audio firmware file and prepare to play it on your computer or mobile device 2 Set your computer or device volume to maximum both in the system OS controls and also in the audio player application 3 Power off the Mini PEG and unpatch all cables 4 Patch the...

Page 10: ...urorack module such as the Listen IO between the computer and the Mini PEG Viewing the Firmware Version On power up the Mini PEG displays its firmware version by flashing two colors on the Ping button The first color turns on immediately after power up then the light turns off for a moment and the second color turns on As of this manual printing the latest and only version number is 1 0 Red then W...

Page 11: ...lse width of the EOF light shows whether the EOF jack outputs gates or triggers When set to gates the EOF light will flash equally on and off When set to triggers the EOF light will flicker briefly on Press the Ping button to toggle 5 Free running Ping The Ping button light will be flashing white or red All other lights will be off The Ping button shows whether the ping clock keeps running after a...

Page 12: ...30mA Envelope Outputs Maximum voltage range ENV OUT 9 4V to 9 4V Maximum amplitude ENV OUT 9 5Vpp Voltage range 5V OUT 0V to 5V Frequency range 0 1dB DC to 1kHz 1 0dB 2 5kHz 2 0dB 4kHz 12 bit 40kHz sample rate Clock Range Period range 29 16 hours to 250µs 4kHz CV Inputs Div Mult and Shape Voltage range 5V to 5V Gate Inputs Ping Trigger Cycle Rising edge threshold 2 5V Page of 12 12 ...

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